LIVERMORE – The Valley Concert Chorale, the Tri-Valley’s premier chorus, is pleased to announce its 48th concert season featuring four performances, two of which include collaborations with the Tri-Valley’s own Las Positas College Chamber Choir and Cantabella Children’s Chorus, as well as the San Francisco Concert Chorale. The 2011-2012 concert season titled “Delightfully Unique Musical Experiences…” opens with an October performance of American spirituals in new arrangements by guest Swedish soprano saxophonist Anders Paulsson. The Chorale’s Artistic Director John Emory Bush explains his excitement about having this talented musician perform for the season’s opening performance.